This is actually a great question/point. I also registered two non "assault weapons" and received certificates for them. (A Ruger 10/22 with pistol grip, and an SKS with a Monte Carlo stock) I believe that you and I were very smart for registering these items for two reasons: 1) If the state of Connecticut seeks to ban these guns in the future they we will already be grandfathered in due to being registered. 2) Since they were registered, they are considered "pre ban" and that means that you can modify them to your hearts desire. However, in the case of an SKS it still must be federally compliant. Anybody else what to chime in on this topic? Happy holidays friends!